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Finding the Fourth Proportional to 18,553.71, 27,787.51 and 18,415.43

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Solution

The fourth proportional to 18,553.71, 27,787.51 and 18,415.43 is: 27,580.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,553.71 : 27,787.51 = 18,415.43 : x
  2. Step 2: Convert to fraction form
    18,553.71/27,787.51 = 18,415.43/x
  3. Step 3: Cross multiply
    18,553.71x = 27,787.51 × 18,415.43
  4. Step 4: Simplify right side
    18,553.71x = 511,718,751.83
  5. Step 5: Solve for x
    x = 511,718,751.83/18,553.71
  6. Step 6: Final answer
    x = 27,580.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.